What's new:
-----------

- New API: fls, flsl, flsll.


What changed:
-------------

Bug Fixes
---------

- Fix scandirat
  Addresses: https://cygwin.com/ml/cygwin/2017-07/msg00045.html

- Fix signal.h with strict features enabled
  Addresses: https://cygwin.com/ml/cygwin/2017-07/msg00051.html
  Addresses: https://cygwin.com/ml/cygwin/2017-07/msg00088.html

- Drop _in and _out in POSIX headers to avoid collision with Windows headers
  Addresses: https://github.com/Alexpux/MSYS2-packages/issues/934

- Handle different environments in cygwin-doc postinstall script
  Addresses: https://cygwin.com/ml/cygwin/2017-07/msg00070.html
